CN218274702U

CN218274702U - Solid-state battery cell, lithium ion battery pack and electrical equipment

Info

Publication number: CN218274702U
Application number: CN202122400133.6U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Shanghai Jusheng Technology Co Ltd
Current assignee: Shanghai Jusheng Technology Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-01-10
Anticipated expiration: 2031-09-30

Abstract

The disclosure relates to a solid-state battery cell, a lithium ion battery pack and electrical equipment. This solid-state electricity core includes: the cross section of the mounting shell is arranged in a regular hexagon shape, the mounting shell comprises a lower shell and an upper cover, and the lower shell and the upper cover are combined to form a mounting cavity; and the pole core is arranged in the installation cavity, the cross section of the pole core is in a regular hexagon shape, the pole core is provided with three positive terminals and three negative terminals, and the positive terminals and the negative terminals are arranged in the regular hexagon shape in a staggered manner at the edges of the pole core. Arbitrary honeycomb shape can be constituteed when using a plurality of solid-state electric cores to connect, need not to use any connection structure, saves a lot of connecting pieces, is favorable to improving energy density, can also reduce the route of ion and electron in the battery simultaneously, and the dispersion is more even, guarantees the thermal diffusivity, guarantees the electric conductivity of solid-state electric core.

Description

Solid-state battery cell, lithium ion battery pack and electrical equipment

Technical Field

The disclosure relates to the technical field of battery equipment, in particular to a solid-state battery cell, a lithium ion battery pack and electrical equipment.

Background

Although the energy density and safety performance of the existing lithium ion battery are further improved through modification and improvement, the lithium ion battery still has many problems, such as easy combustion of electrolyte, precipitation of lithium metal, severe performance attenuation at low temperature or high temperature, metal dissolution and the like, and the problems are still not fundamentally solved. The requirements of the fields of electronic equipment, automobiles, energy storage and the like on high energy density, high safety and wide temperature adaptability of the lithium battery at present can not be met.

After the 21 st century, the high technology is rapidly developed, the fifth industrial revolution is about to be released, and the requirements on the mobile energy storage power supply are further increased. Researchers have proposed the concept of solid state lithium batteries and attempted their manufacture. The solid electrolyte is non-combustible, non-corrosive, non-volatile and liquid-tight, and can not catch fire even at high temperature, so that the safety is higher. Solid-state batteries are receiving much attention in the industry because of their high safety and their lithium exclusion.

The current solid-state battery has extremely high requirements on environment and safety due to the adoption of a metal lithium cathode or other compounds, and meanwhile, the conductivity and the ion exchange performance of the thin-film electrolyte are poor, the conductivity is poor, the thin-film electrolyte can be applied only in a few fields, and cannot be applied in a large scale.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a solid-state cell, a lithium ion battery pack, and an electrical apparatus, which can improve conductivity and energy density, in order to solve the problem of poor conductivity of a solid-state battery.

A solid-state cell, comprising:

the cross section of the mounting shell is arranged in a regular hexagon shape, the mounting shell comprises a lower shell and an upper cover, and the lower shell and the upper cover are combined to form a mounting cavity; and

the pole piece, set up in the installation cavity, the cross section of pole piece personally submits regular hexagon setting, the pole piece has three positive terminal and three negative pole end, and is three positive terminal and three the negative pole end is crisscross to be set up in regular hexagon the edge of pole piece.

In an embodiment of the present disclosure, the pole core includes a plurality of pole pieces, the pole pieces are arranged in a regular hexagon, the plurality of pole pieces are stacked, and two adjacent pole pieces are staggered to form a cylindrical structure with six side surfaces; and at least one tab is arranged on the edge of the pole piece.

In an embodiment of the present disclosure, the pole piece has a tab thereon, and one of the tabs is disposed on one of the edges of the pole piece;

the number of the pole pieces is a multiple of six.

In an embodiment of the present disclosure, the pole piece has two tabs, and the two tabs are symmetrically disposed on two edges of the pole piece;

the number of the pole pieces is multiple of three.

In an embodiment of the present disclosure, the pole core further includes a plurality of diaphragms, and one diaphragm is disposed between adjacent pole pieces;

the size and shape of the diaphragm are the same as the size and shape of the pole piece.

In an embodiment of the present disclosure, the mounting housing further includes three first poles and three second poles, and the plurality of first poles and the plurality of second poles are crosswise disposed on the outer wall of the lower housing and are respectively connected to the positive pole end and the negative pole end;

the first pole is arranged on the surface of the lower shell in a concave mode, and the second pole is arranged on the surface of the lower shell in a convex mode; or, the first pole post is convexly arranged on the surface of the lower shell, and the second pole post is concavely arranged on the surface of the lower shell.

In an embodiment of the disclosure, the pole core further includes a plurality of connecting pieces, a portion of the connecting pieces connect the positive terminal and the first pole, and a portion of the connecting pieces connect the negative terminal and the second pole.

In an embodiment of the present disclosure, the pole piece includes a first pole piece and a second pole piece, the first pole piece has a positive tab, the second pole piece has a negative tab, the first pole piece is made of a first pole piece material, the first pole piece material is a mixture of lithium iron phosphate and a ternary mixed material, the second pole piece is made of a second pole piece material, and the second pole piece material is a mixture of artificial graphite and a silicon-carbon mixed material.

A lithium ion battery pack comprising a plurality of solid state cells as described in any of the above features, wherein an edge of one solid state cell is connected to another solid state cell.

In an embodiment of the present disclosure, the solid-state cells are in contact with the second pole column of the adjacent solid-state cell through the first pole column.

An electrical equipment comprises an equipment main body and a lithium ion battery pack according to any technical characteristics, wherein the lithium ion battery pack is arranged on the equipment main body and supplies power to the equipment main body.

According to the solid-state battery cell, the lithium ion battery pack and the electrical equipment, the cross section of the pole core is in the shape of a regular hexagon, and the pole core is installed behind the installation cavity formed by the upper cover and the lower shell in a surrounding mode and is connected with the negative pole end and the outside through the positive pole end of the edge of the pole core, so that the solid-state battery cell with six side faces is formed. Arbitrary honeycomb shape can be constituteed when a plurality of solid-state electric cores are connected, need not to use any connection structure, save a lot of connecting pieces, be favorable to improving energy density, realize the big multiplying power and discharge, can also reduce the route of ion and electron in the battery simultaneously, the dispersion is more even, guarantee the thermal diffusivity, guarantee the electric conductivity of solid-state electric core, solve the poor problem of electric conductivity, guarantee the performance of solid-state electric core, and then guarantee the performance of lithium ion battery group, the large-scale application of the lithium ion battery group of being convenient for.

Drawings

Fig. 1 is a perspective view of a solid-state cell according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a pole piece in the solid state cell shown in fig. 1;

FIG. 3 is a schematic view of a pole piece in the pole core shown in FIG. 2;

fig. 4 is a schematic diagram of the solid-state cells shown in fig. 1 being multiple and forming a lithium ion battery pack.

Wherein: 10. a lithium ion battery pack; 100. a solid-state cell; 110. installing a shell; 111. a lower housing; 112. An upper cover; 120. a pole core; 121. pole pieces; 1211. a first pole piece; 1212. a second pole piece; 122. a tab; 1221. a positive tab; 1222. a negative tab; 123. a diaphragm; 130. a first pole column; 140. and a second pole.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, embodiments accompanying the present disclosure are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present disclosure, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present disclosure and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present disclosure.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.

In the present disclosure, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral with; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present disclosure can be understood as a specific case by a person of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 4, the present disclosure provides a solid-state battery cell 100. The solid-state battery cell 100 can be applied to the lithium ion battery pack 10, so that the service performance of the lithium ion battery pack 10 is ensured, and the energy density of the lithium ion battery pack 10 is improved. Moreover, the lithium ion battery pack 10 can be applied to electrical equipment to supply power to the electrical equipment.

It can be understood that the current solid-state battery has extremely high requirements on environment and safety due to the adoption of a metallic lithium cathode or other compounds, and meanwhile, the thin-film electrolyte has poor conductivity and ion exchange performance, and the conductivity is poor, so that the solid-state battery can be applied only in a few fields and cannot be applied in a large scale. Therefore, the present disclosure provides a novel solid-state battery cell 100, where the solid-state battery cell 100 can improve the electrical conductivity, and simultaneously can also ensure the heat dissipation performance of the solid-state battery cell 100, thereby facilitating the large-scale application of the lithium ion battery pack 10. The specific structure of the solid-state battery cell 100 is described in detail below.

Referring to fig. 1-4, in an embodiment, a solid-state battery cell 100 includes a mounting housing 110 and a pole piece 120. The cross section of the installation shell 110 is regular hexagon, the installation shell 110 includes a lower shell 111 and an upper cover 112, and the lower shell 111 and the upper cover 112 enclose an installation cavity. The pole piece 120 is arranged in the installation cavity, the cross section of the pole piece 120 is in a regular hexagon shape, the pole piece 120 is provided with three positive terminals and three negative terminals, and the positive terminals and the negative terminals are arranged on the edges of the pole piece 120 in a staggered manner.

Installation casing 110 is the shell of solid-state electric core 100, can play protective structure, and utmost point core 120 in the protection installation casing 110 avoids external unexpected touching utmost point core 120, guarantees solid-state electric core 100's performance, simultaneously, avoids the later stage to pour into the circumstances that battery liquid takes place to leak into behind the battery liquid. Specifically, the mounting housing 110 includes a lower housing 111 and an upper cover 112, and the upper cover 112 is disposed on the lower housing 111 to close the lower housing 111. The upper cover 112 and the lower housing 111 enclose a mounting cavity, and the pole piece 120 is mounted in the mounting cavity. The pole piece 120 is first installed in the lower case 111, the position of the pole piece 120 in the lower case 111 is positioned, after the positioning, the upper cover 112 is covered, and the upper cover 112 and the lower case 111 are uniformly welded.

Moreover, the cross-sectional shape of the mounting casing 110 is a regular hexagon, that is, the mounting casing 110 is a hexagonal prism, the cross-sectional shape of the mounting casing 110 is a honeycomb-shaped hole, and after the plurality of solid battery cells 100 are spliced by the mounting casing 110, a honeycomb-shaped structure is formed, which will be mentioned later. After the cross-sectional shape of the mounting case 110 is formed in a regular hexagon, the cross-sectional shape of the space in the lower case 111 is also formed in a regular hexagon, so that the regular hexagonal pole core 120 is mounted therein.

The cross section of the pole piece 120 is regular hexagon, that is, the pole piece 120 is generally hexagonal prism, and the top view of the pole piece 120 is regular hexagon, as shown in fig. 3 and 4, which is adapted to the shape of the mounting case 110. The pole piece 120 has three positive terminals and three negative terminals, and the three positive terminals and the three negative terminals are alternately disposed on the edge of the pole piece 120. That is, the pole piece 120 is in a regular hexagon shape, the pole piece 120 has six edges, each edge is provided with a positive terminal or a negative terminal, and a negative terminal is arranged between two adjacent positive terminals, that is, the positive terminals and the negative terminals are arranged in a staggered manner. The positive and negative terminals are in contact with adjacent solid state cells 100 of the lithium ion battery pack 10 through the mounting case 110.

After the pole core 120 is installed in the installation casing 110, a single solid-state battery cell 100 is formed, the plurality of solid-state battery cells 100 are spliced to form the lithium ion battery pack 10, the solid-state battery cell 100 is arranged in a regular hexagon shape through the installation casing 110 in the regular hexagon shape and the pole core 120, and the solid-state battery cell 100 is in contact with the side surface of the adjacent solid-state battery cell 100 through the side surface in the hexagon shape. That is to say, when the lithium ion battery pack 10 is formed by using the solid-state battery cells 100 of the present disclosure, a connection structure may not be suitable, many connection members are omitted, which is beneficial to improving the energy density of the lithium ion battery pack 10, and meanwhile, the paths of ions and electrons of the lithium ion battery pack 10 may be reduced, so that the dispersion is more uniform, and the heat dissipation is better.

Adopt solid-state electric core 100 of above-mentioned embodiment, it becomes the hexagon setting, conveniently assemble into lithium ion battery group 10, and, arbitrary honeycomb shape can be constituteed when a plurality of solid-state electric cores 100 connect, need not to use any connection structure, save a lot of connecting pieces, be favorable to improving energy density, realize big multiplying power and discharge, can also reduce the route of ion and electron in the battery simultaneously, the dispersion is more even, guarantee the thermal diffusivity, guarantee solid-state electric core 100's electric conductivity, solve the poor problem of electric conductivity, guarantee solid-state electric core 100's performance, and then guarantee lithium ion battery group 10's performance, be convenient for the large-scale application of lithium ion battery group 10.

Optionally, the mounting housing 110 includes but is not limited to an aluminum shell, and may also be a steel shell or a soft bag, and the soft bag is not limited to a packaging material when being a plastic shell.

Referring to fig. 1 to 4, in an embodiment, the pole core 120 includes a plurality of pole pieces 121, the pole pieces 121 are arranged in a regular hexagon, the pole pieces 121 are stacked, and two adjacent pole pieces 121 are staggered to form a six-sided column structure; at least one tab 122 is arranged on the edge of the pole piece 121.

The pole piece 121 is manufactured by die cutting, and is processed into a regular hexagon which is a honeycomb-shaped hole. The number of the pole pieces 121 is plural, and a plurality of regular hexagonal pole pieces 121 are stacked to form a hexagonal prism structure, that is, a main structure of the pole core 120. The tabs 122 of two adjacent pole pieces 121 are staggered. That is to say, the tab 122 of the upper layer of the pole piece 121 is staggered from the tab 122 of the lower layer of the pole piece 121, so as to avoid the overlapping of the tabs 122 of the two adjacent layers of the pole pieces 121.

Several pole pieces 121 are taken as a group and marked as a pole group, and the number of the pole lugs 122 after the pole pieces 121 are laminated is six, and the number corresponds to six edges of the pole pieces 121 respectively. The remaining pole pieces 121 are grouped in a pole group, and stacked on the pole group, so that the pole core 120 is formed. The tabs 122 in the same vertical direction are stacked to form a positive terminal or a negative terminal. It is worth to be noted that the two positive terminals are not adjacently arranged, the two negative terminals are not adjacently arranged, one of the two positive terminals is the positive terminal, and the two adjacent sides are the negative terminals. Of course, the positions of the positive terminal and the negative terminal can be interchanged, which is not described herein. In addition, the number of the tabs 122 on the same pole piece 121 may be one or two, and the arrangement form thereof is described in detail later.

Referring to fig. 1 to 4, in an embodiment of the present disclosure, the pole piece 121 has a tab 122 thereon, and one of the tabs 122 is disposed on one edge of the pole piece 121. The number of pole pieces 121 is a multiple of six. That is, a tab 122 is disposed on the same pole piece 121, the tab 122 is disposed on any edge of the pole piece 121, and the tab 122 extends away from the center of the pole piece 121.

When the pole pieces 121 with one pole lug 122 are stacked, the phase difference between the six stacked pole pieces 121 is sequentially 60 degrees, so that the pole lugs 122 of the six pole pieces 121 are respectively arranged in a staggered mode and respectively correspond to six edges of a regular hexagon, and at the moment, the six pole pieces 121 form a group of pole groups. The pole piece 121 is repeatedly laminated on the pole group in units of six pole pieces 121 to form the pole core 120. Alternatively, the height of the pole piece 120 is designed as desired.

In another embodiment of the present disclosure, the pole piece 121 has two tabs 122, and the two tabs 122 are symmetrically disposed on two edges of the pole piece 121. The number of pole pieces 121 is a multiple of three. That is, two tabs 122 are disposed on the same pole piece 121, the two tabs 122 are disposed on two parallel edges, and the tabs 122 extend in a direction away from the center of the pole piece 121.

When the pole pieces 121 with the two pole lugs 122 are stacked, the phase difference between the stacked three pole pieces 121 sequentially differs by 60 degrees, so that the six pole lugs 122 of the three pole pieces 121 are respectively arranged in a staggered manner and correspond to the six edges of a regular hexagon, and at the moment, the three pole pieces 121 form a group of pole groups. The lamination of the pole pieces 121 to the pole group is repeated with three pole pieces 121 as a unit, to form the pole core 120. Optionally, the height of the pole piece 120 is designed as desired.

Referring to fig. 1 to 4, in an embodiment, the pole core 120 further includes a plurality of diaphragms 123, and one diaphragm 123 is disposed between adjacent pole pieces 121. The diaphragm 123 is used to separate two adjacent pole pieces 121, and to prevent electrons in the solid-state battery cell 100 from freely passing through, and to allow ions in the electrolyte to freely pass between the adjacent pole pieces 121.

A diaphragm 123 is arranged between two adjacent pole pieces 121, the two pole pieces 121 are separated by the diaphragm 123, and the diaphragm 123 is arranged on two sides of the laminated pole pieces 121, so that the performance of the pole core 120 is ensured. Optionally, the size and shape of the diaphragm 123 is the same as the size and shape of the pole piece 121. This ensures the insulating effect of the diaphragm 123.

Referring to fig. 1 to 4, in an embodiment, the mounting housing 110 further includes three first poles 130 and three second poles 140, and the first poles 130 and the second poles 140 are disposed on an outer wall of the lower housing 111 in a crossing manner and respectively connect the positive terminal and the negative terminal. The first pole post 130 is concavely arranged on the surface of the lower shell 111, and the second pole post 140 is convexly arranged on the surface of the lower shell 111; alternatively, the first pole post 130 is convexly disposed on the surface of the lower housing 111, and the second pole post 140 is concavely disposed on the surface of the lower housing 111.

The first electrode post 130 and the second electrode post 140 are disposed on the side surfaces of the lower case 111, and one of the side surfaces is disposed with the first electrode post 130, and the two adjacent side surfaces are disposed with the second electrode post 140, and the first electrode post 130 and the second electrode post 140 are used for connecting the solid-state battery cell 100 in the lithium ion battery pack 10 with the adjacent solid-state battery cell 100. The first pole post 130 and the second pole post 140 can also be connected to the positive or negative end of the pole piece 120 in the lower housing 111.

Specifically, when two adjacent solid-state battery cells 100 are connected, the side surfaces of the two adjacent solid-state battery cells 100 are opposite and gradually attached to each other, and the first pole 130 of one of the solid-state battery cells 100 is connected to the second pole 140 of the other solid-state battery cell 100. Can need not to use any connection structure like this, save a lot of connecting pieces, be favorable to improving battery density, realize the big multiplying power and discharge, can also reduce the route of ion and electron in the battery simultaneously, the dispersion is more even, guarantees the thermal diffusivity, guarantees solid-state electric core 100's electric conductivity.

Moreover, the first electrode post 130 and the second electrode post 140 are arranged in a concave-convex structure, so that two adjacent solid-state battery cells 100 can be connected conveniently. Alternatively, the first pole post 130 is convexly disposed on the surface of the lower housing 111, and the second pole post 140 is concavely disposed on the surface of the lower housing 111. In this way, when two adjacent solid-state battery cells 100 are connected, the two solid-state battery cells 100 can be conveniently attached and connected through the convex first pole column 130 and the concave second pole column 140, which is beneficial to improving the energy density of the lithium ion battery pack 10. Optionally, the first pole post 130 is concavely disposed on the surface of the lower housing 111, and the second pole post 140 is convexly disposed on the surface of the lower housing 111. Thus, when two adjacent solid-state battery cells 100 are connected, two solid-state battery cells 100 can be conveniently attached and connected through the concave first pole column 130 and the convex second pole column 140, which is beneficial to improving the energy density of the lithium ion battery pack 10.

Alternatively, the positions of both the first pole post 130 and the second pole post 140 on the lower case 111 are not limited in principle as long as the connection can be facilitated. In the present embodiment, the first pole post 130 and the second pole post 140 are disposed at the center of the side surface. As shown in fig. 1, the protruded pole column is used as the first pole column 130 in the present disclosure, and the recessed pole column is used as the second pole column 140 in the present disclosure, but of course, in other embodiments of the present disclosure, the protruded pole column may be the second pole column 140, and the recessed pole column may be the first pole column 130. Optionally, there may be a height difference between the adjacent first and

second poles

130 and 140, or the heights may be the same.

In one embodiment, the pole piece 120 further includes a plurality of tabs, a portion of the tabs connecting the positive terminal to the first pole post 130, and a portion of the tabs connecting the negative terminal to the second pole post 140. The connecting pieces are used for respectively connecting the positive electrode end and the negative electrode end with the first pole column 130 and the second pole column 140. In the present disclosure, the positive terminal and the first pole 130 are connected by welding through a portion of the connection sheet, and the negative terminal and the second pole 140 are connected by welding through a portion of the connection sheet. Of course, in other embodiments of the present disclosure, the positive terminal and the second pole post 140 are connected by a portion of the connection tab, and the negative terminal and the first pole post 130 are connected by a portion of the connection tab.

The assembly process of the solid-state battery cell 100 described above is: the die-cut pole pieces 121 are placed into electrolyte to be soaked for 1-10h, then taken out and dried until the surfaces of the pole pieces are dry, meanwhile, the inside of the pole pieces is completely soaked, then the pole pieces are overlapped with a diaphragm 123 of organic solid electrolyte flexible ions in a crossed mode, the diaphragm 123 is coated with glue, the number of layers is at least 6, the positive pole end and the negative pole end are crossed in six directions, then hot pressing is carried out, then the same pole lugs 122 are welded on a connecting piece in an ultrasonic mode, then the connecting piece is welded on a first pole column 130 and a second pole column 140 which are arranged in a concave-convex mode on a lower shell 111, sealing is carried out through an upper cover 112, wiring is carried out, and capacity grading is carried out, and the solid-state cell 100 of the honeycomb monomer is manufactured.

In an embodiment, the pole piece 121 includes a first pole piece 1211 and a second pole piece 1212, the first pole piece 1211 has a positive electrode tab 1221, the second pole piece 1212 has a negative electrode tab 1222, the first pole piece 1211 is made of a first pole piece material, the first pole piece material is a mixture of lithium iron phosphate and a ternary mixed material, the second pole piece 1212 is made of a second pole piece material, and the second pole piece material is a mixture of artificial graphite and a silicon-carbon mixed material.

Specifically, the first electrode 1211 is made of a first electrode material which is a mixture of lithium iron phosphate and a ternary mixed material, and the second electrode 1212 is made of a second electrode material which is a mixture of artificial graphite and silicon carbon, and the first electrode material and the second electrode material are respectively made into colloidal slurries with high viscosity, and then the colloidal slurries are uniformly sprayed on the current collector. The positive plate and the positive tab 1221 are made of porous aluminum foil with a conductive coating, the negative tab 1222 and the negative plate are made of porous copper foil with a conductive coating, and then the pole pieces 121 are quickly dried and rolled, and die-cut into hexagonal honeycomb shapes by using a die-cutting grinding tool pole piece 121, as shown in fig. 3. Soaking the electrolyte for 1h, baking to dry the surface, completely soaking the inside, then laminating the positive and negative electrode tabs 122 adjacently and crossly in the lamination process, using an organic solid electrolyte flexible ion diaphragm 123, gluing the diaphragm 123, and then hot-pressing, as shown in fig. 4. Then, the honeycomb-shaped lower shell 111 is turned into, the tabs 122 are respectively welded on the connecting sheets, the connecting sheets are welded on the first pole column 130 and the second pole column 140 which are concave-convex alternated, and after the sealing is carried out through the upper cover 112, the external power supply is applied to form the partial capacity, so that the honeycomb-shaped single solid-state battery core 100 is manufactured, and the performance is tested as shown in fig. 1.

The individual solid-state cells 100 are then grouped together, and the gaps are filled with thermal paste to form the lithium ion battery pack 10, as shown in fig. 4, and tested for performance. Through testing, the 3C discharge of the single battery does not exceed 10 ℃, the 1C/1C cycle life exceeds 3200 times, the battery can be discharged continuously by 3C after being grouped, the temperature difference does not exceed 5 ℃ at most, the cycle life exceeds 2700 times, the cycle life is far higher than that of the solid-state battery core 100 of the same type currently being developed, and the qualitative leap is realized on the performance of each aspect of the battery.

The solid-state battery cell 100 is formed by mixing positive and negative electrode materials into high-viscosity slurry, spraying the slurry on the surface of the porous current collector with the conductive agent coating, baking at a high speed, drying, rolling, and die-cutting to form the honeycomb-shaped pole piece 121. The spraying mode can solve the problem of complex processing technology of the solid-state battery cell 100, can also solve the technological difficulty of the existing solid-state battery cell 100, combines the advantages of the liquid-state battery cell 100 and the solid-state battery cell 100, and improves the efficiency. Optionally, the manner of soaking the electrode sheet 121 in the electrolyte to dry is not limited to the oven baking manner, and may also be other forms capable of implementing baking.

This solid-state electric core 100 of disclosure makes pole piece 121, utmost point core 120 and installation casing 110 into regular hexagon's shape, and the independent assortment between the solid-state electric core 100 of being convenient for reduces the quantity of battery structure spare, and then promotes energy density, can also solve the longer electric conductivity problem of lithium cell lithium ion and electron route reaction simultaneously, improves solid-state electric core 100's electric conductivity, guarantees solid-state electric core 100's performance.

Referring to fig. 4, the present disclosure also provides a lithium ion battery pack 10, which includes a plurality of solid-state cells 100 described in the above embodiments, wherein an edge of one solid-state cell 100 is connected to another solid-state cell 100. The cross section of the solid-state battery cell 100 is a regular hexagon structure, when a plurality of solid-state battery cells 100 are spliced, the adjacent solid-state battery cells 100 can be abutted through the side faces of the regular hexagon to form the honeycomb lithium ion battery pack 10,

it should be noted that the number of the solid-state cells 100 in the lithium ion battery pack 10 is not limited in principle, and the solid-state cells can be combined into a honeycomb shape at will to meet different use requirements. Gaps between two adjacent solid-state battery cells 100 are filled with heat-conducting glue.

This lithium ion battery group 10 of disclosure forms through the concatenation of regular hexagon's solid-state electric core 100, need not to use any connection structure, saves a lot of connecting pieces, is favorable to improving the energy density of battery, realizes that big multiplying power discharges, can also reduce the route of ion and electron in the battery simultaneously, and the dispersion is more even, guarantees the thermal diffusivity, guarantees solid-state electric core 100's electric conductivity.

In an embodiment, the solid-state battery cell 100 is in contact with the second pole 140 of the adjacent solid-state battery cell 100 through the first pole 130. That is, by the concave-convex first pole post 130 being engaged with the second pole post 140, a connection wire is not required. Specifically, when one of the solid-state battery cells 100 is connected to another solid-state battery cell 100, the first pole 130 protruding from the side of the solid-state battery cell 100 is inserted into the second pole 140 recessed from the side of the other solid-state battery cell 100. Many connecting pieces can be saved like this, be favorable to improving the energy density of battery, realize big multiplying power and discharge, the route of ion and electron in the battery can also be reduced simultaneously, and the dispersion is more even, guarantees the thermal diffusivity, guarantees solid-state electric core 100's electric conductivity.

The present disclosure further provides an electrical device, which includes a device main body and the lithium ion battery pack 10 described in the embodiments on the market, wherein the lithium ion battery pack 10 is disposed in the device main body and supplies power to the device main body. After the electrical equipment adopts the lithium ion battery pack 10 of the embodiment, the normal work of the electrical equipment can be ensured. It is noted that the electrical device may be an electric vehicle, an electric bicycle or other devices using the lithium ion battery pack 10.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in more detail and detailed, but are not to be construed as limiting the scope of the disclosure. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the disclosure, and these changes and modifications are all within the scope of the disclosure. Therefore, the protection scope of the present disclosure should be subject to the appended claims.

Claims

1. A solid-state cell, comprising:

2. The solid-state electric core according to claim 1, wherein the pole core comprises a plurality of pole pieces, the pole pieces are arranged in a regular hexagon, the plurality of pole pieces are stacked, and two adjacent pole pieces are staggered to form a cylindrical structure with six side surfaces; and at least one tab is arranged on the edge of the pole piece.

3. The solid-state cell of claim 2, wherein the pole piece has a tab thereon, one of the tabs being disposed at one of the edges of the pole piece;

the number of the pole pieces is a multiple of six.

4. The solid-state cell of claim 2, wherein the pole piece has two tabs symmetrically disposed at two edges of the pole piece;

the number of the pole pieces is multiple of three.

5. The solid-state electrical core of any of claims 2 to 4, wherein the pole core further comprises a plurality of diaphragms, one diaphragm being disposed between adjacent pole pieces;

6. The solid-state electrical core of any one of claims 2 to 4, wherein the mounting casing further comprises three first poles and three second poles, and the plurality of first poles and the plurality of second poles are arranged on the outer wall of the lower casing in a crossed manner and are respectively connected with the positive electrode terminal and the negative electrode terminal;

the first pole is arranged on the surface of the lower shell in a concave mode, and the second pole is arranged on the surface of the lower shell in a convex mode; or, the first pole is arranged on the surface of the lower shell in a protruding mode, and the second pole is arranged on the surface of the lower shell in a recessed mode.

7. The solid-state cell of claim 6, wherein the core further comprises a plurality of tabs, some of the tabs connecting the positive terminal to the first terminal and some of the tabs connecting the negative terminal to the second terminal.

8. The solid-state electrical core of any of claims 2 to 4, wherein the pole pieces comprise a first pole piece and a second pole piece, the first pole piece having a positive tab and the second pole piece having a negative tab.

9. A lithium ion battery comprising a plurality of solid state cells according to any of claims 1 to 8, wherein an edge of one solid state cell is connected to another solid state cell.

10. The lithium ion battery pack of claim 9, wherein the solid state cells are in contact with the second pole of an adjacent solid state cell through a first pole.

11. An electric device characterized by comprising a device body and the lithium ion battery pack according to claim 9 or 10, which is provided in the device body to supply power to the device body.